Original 1st printing 14 x 20" late 1966 double-sided test-proof/overprint featuring elements of both the FD 41 (Country Joe/Moby Grape by Mouse/Kelley) and FD 42 (Quicksilver/Steve Miller by Moscoso) posters, along with NUMEROUS other single passes of ink from a number of unidentifiable posters.
Art by Victor Moscoso, Stanley Mouse and Alton Kelly (and others), medium flat vellum stock poster is in SUPERB near mint (A-/B+) condition; aside from a series of VERY soft handling dings, a touch of curl to the paper and a couple of tiny areas of ink spread, this example can't be beat.
ULTRA-TRIPPY looking and VERY unique double-sided press sheet from late 1966, this one likely came from the Double-H Press in San Francisco.